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Method for manufacturing enthalpy wheel of humidifier of fuel cell by utilizing aramid fiber material

A fuel cell and humidifier technology, applied in the direction of fuel cells, fuel cell additives, electrochemical generators, etc., can solve the problem that the ceramic enthalpy wheel humidifier cannot meet the high efficiency and long-term operation of the fuel cell system Requirements, increasing system quality and rotating motor power consumption, affecting the life of the humidifier and other issues, to achieve the effect of low density, small wear and long life

Inactive Publication Date: 2011-07-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems in the use of ceramic materials as the enthalpy wheel: (1) the density of ceramics is high, which increases the system quality and the power consumption of the rotating motor, especially when it is used in automobiles and other applications. The shells are worn, and there is a certain gap between them, which will cause part of the gas to mix back and reduce the oxygen concentration in the air after humidification; (3) ceramics as the humidification enthalpy wheel wear more, and the noise is louder , affecting the life of the humidifier
Due to these problems, ceramic enthalpy wheel humidifiers cannot meet the requirements of high efficiency and long-term operation of fuel cell systems

Method used

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  • Method for manufacturing enthalpy wheel of humidifier of fuel cell by utilizing aramid fiber material
  • Method for manufacturing enthalpy wheel of humidifier of fuel cell by utilizing aramid fiber material
  • Method for manufacturing enthalpy wheel of humidifier of fuel cell by utilizing aramid fiber material

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Experimental program
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Effect test

Embodiment 1

[0027] 1) Ingredients: Weigh the various substances used according to the size of the enthalpy wheel in the actual humidification device. The substances used are aramid fiber or aramid pulp, phenolic resin, graphite powder, ammonium bicarbonate, fillers, etc. The phenolic resin used is a modified phenolic resin (grade 5173) modified by nitrile rubber. The parts by mass of the ingredients are as follows: the aramid fiber accounts for 65 parts by weight, the phenolic resin accounts for 15 parts by weight; the ammonium bicarbonate accounts for 5 parts by weight, and the graphite powder accounts for 15 parts by weight.

[0028] 2) Mixing: add ethanol to the weighed mixture of components to make it evenly mixed, and then stir evenly for 1 hour.

[0029] 3) Hot pressing molding: Vacuum-dry the mixed wet material obtained by mixing, and then mold the dried material into a cylindrical shape at a temperature of 150° C.; a pressure of 0.20 MPa; and a time of 30 minutes. At the initial...

Embodiment 2

[0034] 1) Ingredients: Weigh the various substances used according to the size of the enthalpy wheel in the actual humidification device. The materials used are aramid pulp, phenolic resin (grade 5123), graphite powder, ammonium bicarbonate, fillers, etc. The parts by mass of the ingredients are: 60 parts by weight of aramid fiber, 20 parts by weight of phenolic resin, 5 parts by weight of ammonium bicarbonate, and 15 parts by weight of graphite powder.

[0035] 2) Mixing: add ethanol to the weighed mixture of components to make it evenly mixed, and then stir evenly for 1 hour.

[0036] 3) Hot pressing molding: Vacuum-dry the mixed wet material obtained by mixing, and then put the dried material into a mold for compression molding, the molding temperature is 160° C.; the pressure is 0.2 MPa; the time is 40 minutes. At the initial stage of hot pressing, choose to deflate once every 2 minutes, and deflate 4 times in total. Under the action of ammonium bicarbonate, the cylinder...

Embodiment 3

[0041] 1) Ingredients: Weigh the various substances used according to the size of the enthalpy wheel in the actual humidification device. The substances used are aramid pulp, phenolic resin, graphite powder, ammonium bicarbonate, curing agent (urotropine), filler, etc. The phenolic resin that adopts is cashew nut shell oil, melamine modified liquid phenolic resin (brand is 5184). The parts by mass of the ingredients are: 55 parts by weight of the aramid fiber, 20 parts by weight of the phenolic resin, 5 parts by weight of ammonium bicarbonate, 5 parts by weight of the curing agent, and 15 parts by weight of the graphite powder.

[0042] 2) Mixing: Add ethanol to the weighed mixture of components to disperse and mix them, and then stir evenly. The stirring time is 0.5h.

[0043] 3) Hot pressing molding: vacuum-dry the mixed wet material obtained by mixing, and then mold the dried material into a cylindrical shape at a temperature of 150° C.; a pressure of 0.2 MPa; and a time o...

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Abstract

The invention discloses a method for manufacturing an enthalpy wheel of a humidifier of a fuel cell by utilizing an aramid fiber material, belonging to the technical field of fuel cells. The method comprises the following steps: taking an aramid fiber or pulp as a structural strength base material; mixing the aramid fiber, a binder, ammonium bicarbonate, a curing agent and a filler; adding ethanol; and evenly stirring to obtain a mixed wet material; vacuum drying the mixed wet material; hot pressing the mixed wet material to prepare into a porous honeycomb cylinder; further performing heat treatment to obtain the enthalpy wheel; and finally installing the enthalpy wheel into a casing of the humidifier, and leading the center of the wheel shaft of the enthalpy wheel to be connected with a motor by which a rotation wheel is driven to rotate; dividing the humidifier into two areas through a baffle; and separating the fresh air and the gas discharged from the cathode of the fuel cell to obtain the rotation wheel of the humidifier. By the method provided by the invention, the fuel cell can be effectively heated and humified in the gas, and the property of the proton exchange membrane fuel cell can be well exerted. The enthalpy wheel has a simple preparation process, excellent performance, and lower operation cost, and long service life.

Description

technical field [0001] The invention relates to a method in the technical field of fuel cells, in particular to a method for manufacturing an enthalpy wheel of a fuel cell humidifier by using an aramid fiber material. Background technique [0002] The air humidification process is one of the most important links in proton exchange membrane fuel cells. The proton conductivity of the proton exchange membrane is an important parameter affecting the performance of the proton exchange membrane fuel cell. Therefore, the proton exchange membrane needs to maintain a good water wet state during the operation of the battery to have high proton conductivity. If the proton exchange membrane is dehydrated or dry, the membrane resistance will increase, leading to high ohmic loss, battery performance degradation, and at the same time, the mechanical strength will decrease. In severe cases, the membrane will rupture, causing hydrogen and oxygen to mix and explode. However, another aspect i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04H01M8/04828
CPCY02E60/50Y02P70/50
Inventor 隋升曾亚平王山领
Owner SHANGHAI JIAO TONG UNIV
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